U+EFEF

U+EFEF

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U+EFEF is not a valid unicode character.
Encodings
HTML Entity (decimal) 
HTML Entity (hex) 
How to type in Microsoft Windows Alt +EFEF
UTF-8 (hex) 0xEE 0xBF 0xAF (eebfaf)
UTF-8 (binary) 11101110:10111111:10101111
UTF-16 (hex) 0xEFEF (efef)
UTF-16 (decimal) 61,423
UTF-32 (hex) 0x0000EFEF (efef)
UTF-32 (decimal) 61,423
C/C++/Java source code "\uEFEF"
Python source code u"\uEFEF"
More...
Java Data
string.toUpperCase()
string.toLowerCase()
Character.UnicodeBlock PRIVATE_USE_AREA
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_LEFT_TO_RIGHT [0]
Character.getNumericValue() -1
Character.getType() 18
Character.isDefined() Yes
Character.isDigit() No
Character.isIdentifierIgnorable() No
Character.isISOControl() No
Character.isJavaIdentifierPart() No
Character.isJavaIdentifierStart() No
Character.isLetter() No
Character.isLetterOrDigit() No
Character.isLowerCase() No
Character.isMirrored() No
Character.isSpaceChar() No
Character.isSupplementaryCodePoint() No
Character.isTitleCase() No
Character.isUnicodeIdentifierPart() No
Character.isUnicodeIdentifierStart() No
Character.isUpperCase() No
Character.isValidCodePoint() Yes
Character.isWhitespace() No